Radio location system

Claim 2

A radio location system for locating the position of a radio transmitter comprising a plurality of spaced receiving stations and a comparing station, each receiving station having means for summing the arrival times of signals received from said radio transmitter, means for counting said received signals means for dividing said summation by said count to yield average arrival times and means for transmitting said average arrival times and said signal count to said comparing station.

Claim 3

A radio location system for locating the position of a radio transmitter transmitting pulse or otherwise modulated signals comprising a plurality of spaced receiving stations, means for providing synchronized clock signals to each of said receiving stations, and comprising for each station counting means responsive to said clock signals, adding means coupled to the output of said counting means, means responsive to signals from said radio transmitter for coupling the output of said counting means to said adding means so that the arrival times of signals from said radio transmitter as represented by said counting means are added, means to count said radio wave signals received and means to divide said summation of arrival times by said count to yield average arrival time.

Claim 4

A radio location system for locating the position of a radio transmitter transmitting pulse or otherwise modulated signals comprising a plurality of spaced receiving stations, means for providing synchronized clock signals to each of said receiving stations, and comprising for each station counting means responsive to said clock signals, adding means coupled to the output of said counting means, means responsive to signals from said radio transmitter for coupling the output of said counting means to said adding means so that the arrival times of signals from said radio transmitter as represented by said counting means are added, means to count said radio wave signals received and means to divide said summation of arrival times by said count to yield average arrival time.

Claim 5

A radio location system as claim 2 and further including at each staTion means to transmit said average arrival time and said count to a comparing station for determining the differential average time of arrival of signals from said radio transmitter at each of said receiving stations so as to establish the location of said radio wave transmitter.

Claim 6

A radio location system for locating the position of a radio transmitter comprising a plurality of spaced receiving stations, a transmitter to transmit synchronizing signals and a comparing station, each receiving station comprising means for providing synchronized clock pulses in time synchronism with said tramsmitted synchronizing signals, first counting means responsive to said clock pulses, adding means, means responsive to signals from said radio transmitter for coupling the output of said counting means to said adding means so that the arrival times of said radio signals indicated by the output of said counting means are added together, second counting means to count said radio signals received, means for dividing the output of said adding means by the output of said second counting means and means to communicate the output of said dividing means and the output of said second counting means to said comparing station tso that the average arrival times of said transmitted signals from said radio transmitter to each of said receiving stations may be compared and the hyberbolic coordinates describing the location of said radio transmitter determined.

Claim 7

A radio location system for locating the position of a radio transmitter comprising a plurality of spaced receiving stations, a transmitter to transmit synchronizing signals and a comparing station, each receiving station comprising means for providing synchronized clock pulses in time synchronism with said tramsmitted synchronizing signals, first counting means responsive to said clock pulses, adding means, means responsive to signals from said radio transmitter for coupling the output of said counting means to said adding means so that the arrival times of said radio signals indicated by the output of said counting means are added together, second counting means to count said radio signals received, means for dividing the output of said adding means by the output of said second counting means and means to communicate the output of said dividing means and the output of said second counting means to said comparing station tso that the average arrival times of said transmitted signals from said radio transmitter to each of said receiving stations may be compared and the hyberbolic coordinates describing the location of said radio transmitter determined.

Claim 8

A radio location system as in claim 4 wherein said means for providing synchronized clock pulses to each of said receiving stations includes receiver means, delay means coupled to the output of said receiver means, a controlled oscillator and phase control means coupling said controlled oscillator and said delay means so that the outputs of said controlled oscillators at each of said stations are time synchronized and means at each of said receiver stations to apply the output of said controlled oscillator to said first counting means.

Claim 9

A radio location system as in claim 4 wherein each said receiving station further includes a controlled oscillator and said first counting means and said adding means include frequency divider means coupled to the output of said controlled oscillator by first gating means, a source of starting pulse signals means to apply said starting signals to said gating means simultaneously with similar starting signals of said other receiving stations, first storage means to store the output of said frequency divider, second gating means coupling the output of said frequency divider to said first storage means and responsive to signals from said radio transmitter, adding means, third gating means coupling the output of said first storage means to the input of said adding means, second storage means coupled to the output of said adding means, third storage means, fourth gating means coupling the output of said second storage means to said third storage means, fifth gating means coupling the output of said third storage means to the input of said adding means and control means responsive to signals from said radio transmitter for applying signals to control said second, third, fourth and fifth gating means and to control clear all of said storage means in a predetermined sequence so that the arrival times of said signals from said radio transmitter at each of said stations are summed and their summation stored in said third storage means at each of said receiving stations.

Claim 10

A radio location system as in claim 4 wherein said means to communicate includes teletype communication link.

Claim 11

A radio location system as in claim 4 wherein said comparing location includes teletype printers responsive to the outputs from said receiving stations for printing average arrival times, and said counts of radio signals.

Claim 12

A radio location system for locating the position of an unknown radio transmitter comprising a transmitter at a known location a plurality of spaced receiving stations each comprising automatic phase control Means and a controlled oscillator coupled to said automatic phase control means, first receiver means responsive to signals from said transmitter at said known location, delay means coupling the output of said receiver means to said automatic phase control means, first gating means coupling the output of said oscillator to first counting means, a starting pulse source means responsive to signals from said starting pulse source to control said first gating means and to clear said first counting means, first storage means coupled to the output of said first counting means by second gating means, binary adding means coupled to the output of said first storage means by third gating means, second storage means coupled to the output of said binary adding means, third storage means coupled to the output of said second storage means by fourth gating means, fifth gating means coupling the output of said third storage means to the input of said binary adding means, second receiver means responsive to signals from said unknown radio transmitter, differentiating means coupled to the output of said second receiver means, pulse generating means coupled to the output of said differentiating means, gate control means and storage clearing means coupled to the output of said pulse generating means and to the output of said oscillator so that a pulse from said pulse generating means causes successive pulses from said controlled oscillator to be applied to said first, third, fourth and fifth gating means, in that order, and other successive pulses from said oscillator to be applied to said first, second and third storage means clearing them in that order, second counting means coupled to the output of said pulse generating means, fourth storage means coupled to the output of said second counting means, dividing means coupled to said third storage means and said second counting means, teletype converting means, means coupling the output of said dividing means and said second counting means to said teletype converting means, output data storage means coupled to the output of said converting means, tape punch means coupled to the output of said output data storage means, a teletype transmitter coupled to the output of said tape punch means and teletype printing means responsive to said teletype transmitter for printing numbers representative of average arrival times of said radio signals and said radio signal count.

Claim 13

A radio location system for locating the position of an unknown radio transmitter comprising a transmitter at a known location a plurality of spaced receiving stations each comprising automatic phase control Means and a controlled oscillator coupled to said automatic phase control means, first receiver means responsive to signals from said transmitter at said known location, delay means coupling the output of said receiver means to said automatic phase control means, first gating means coupling the output of said oscillator to first counting means, a starting pulse source means responsive to signals from said starting pulse source to control said first gating means and to clear said first counting means, first storage means coupled to the output of said first counting means by second gating means, binary adding means coupled to the output of said first storage means by third gating means, second storage means coupled to the output of said binary adding means, third storage means coupled to the output of said second storage means by fourth gating means, fifth gating means coupling the output of said third storage means to the input of said binary adding means, second receiver means responsive to signals from said unknown radio transmitter, differentiating means coupled to the output of said second receiver means, pulse generating means coupled to the output of said differentiating means, gate control means and storage clearing means coupled to the output of said pulse generating means and to the output of said oscillator so that a pulse from said pulse generating means causes successive pulses from said controlled oscillator to be applied to said first, third, fourth and fifth gating means, in that order, and other successive pulses from said oscillator to be applied to said first, second and third storage means clearing them in that order, second counting means coupled to the output of said pulse generating means, fourth storage means coupled to the output of said second counting means, dividing means coupled to said third storage means and said second counting means, teletype converting means, means coupling the output of said dividing means and said second counting means to said teletype converting means, output data storage means coupled to the output of said converting means, tape punch means coupled to the output of said output data storage means, a teletype transmitter coupled to the output of said tape punch means and teletype printing means responsive to said teletype transmitter for printing numbers representative of average arrival times of said radio signals and said radio signal count.

Claim 14

A radio location system as in previous claim 9 and further including third counting means coupled to the output of said first counting means, teletype means to apply the output from said third counting means to said code converting means so that said teletype printing means prints interval identification symbols assocaited with said average arrival times and counts.

Claim 15

A radio location system for locating the position of a radio transmitter comprising a plurality of spaced receiving stations and a comparing station, each receiving station having means for summing the arrival times of signals received from said radio transmitter, means to derive the average arrival times therefrom and means for transmitting said average arrival times to said comparing station.

Claim 16

A radio location system for locating the position of a radio transmitter comprising a plurality of spaced receiving stations and a comparing station, each receiving station having means for summing the arrival times of signals received from said radio transmitter, means to derive the average arrival times therefrom and means for transmitting said average arrival times to said comparing station.